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Finding the Fourth Proportional to 2,991.66, 4,486.99 and 1,881.15

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Solution

The fourth proportional to 2,991.66, 4,486.99 and 1,881.15 is: 2,821.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,991.66 : 4,486.99 = 1,881.15 : x
  2. Step 2: Convert to fraction form
    2,991.66/4,486.99 = 1,881.15/x
  3. Step 3: Cross multiply
    2,991.66x = 4,486.99 × 1,881.15
  4. Step 4: Simplify right side
    2,991.66x = 8,440,701.24
  5. Step 5: Solve for x
    x = 8,440,701.24/2,991.66
  6. Step 6: Final answer
    x = 2,821.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.